The Democratic incumbents at the top of Pennsylvania’s ballot have maintained their wide advantages in a new Morning Call/Muhlenberg College poll released Friday, days before the state’s voters head to the polls.

Gov. Tom Wolf handily leads his Republican challenger, former state Sen. Scott Wagner, 58 percent to 37 percent, when those leaning toward a particular candidate are included. In the U.S. Senate race, incumbent Bob Casey also has a double-digit edge in his campaign for a third term, topping GOP challenger U.S. Rep. Lou Barletta, 54 percent to 40 percent.

“It’s a tough cycle for Republicans — that’s held in the polling all year long,” said Chris Borick, a political scientist and director of the Muhlenberg College Institute of Public Opinion. “It’s left these races as sleepy as they appear.”

Those consistent, wide margins for Democrats could have ripple effects down the ballot for Republican candidates and likely raise concerns for those in close contests.

“The idea that they might not be getting any lift from the top of the ticket has to be troubling,” Borick said. “You certainly want some kind of pull from the Senate and governor races, and we see the opposite effect happening.”

Both Wolf and Casey have seen their approval ratings rise compared with the Muhlenberg College Institute of Public Opinion’s past surveys in April and September. For Wolf, 57 percent say they approve of the performance by the York-businessman-turned-governor, up from 46 percent in April, and 33 percent disapprove.

As for Casey, 50 percent approve of his efforts on Capitol Hill, an increase from 41 percent in April, and 29 percent disapprove.

President Donald Trump’s approval rating also improved slightly, up to 43 percent compared with 39 percent in April. But a majority of likely voters — 52 percent — still indicated disapproval of Trump’s handling of his presidency.

The third-party candidates in each race — who did not garner above 2 percent in a September Morning Call/Muhlenberg College survey — were not included in the latest poll.

Also on the ballot in the governor’s race are Libertarian Ken Krawchuk and Green Party candidate Paul Glover. In the U.S. Senate race, Green Party candidate Neal Gale and Libertarian Dale Kerns Jr. are running.

The polling institute surveyed 421 likely Pennsylvania voters on landlines and cellphones between Oct. 28 and Nov. 1. The poll has a margin of error of plus or minus 5.5 percentage points.